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Spin Structure Functions of the Nucleon
Xiangdong Ji
I begin with a general discussion about importance of constructing a picture of the nucleon in terms of QCD degrees of freedom, emphasizing the role of spin structure functions. I…
The Spin Structure of the Nucleon in the Asymptotic Limit
X. Ji, J. Tang, P. Hoodbhoy
In analogy to the Altarelli-Parisi equation for the quark and gluon helicity contributions to the nucleon spin, we derive an evolution equation for the quark and gluon orbital angu…
Polarizabilities of Gluon Fields in a Polarized Nucleon
Xiangdong Ji
This paper has been withdrawn by the author.
Matching Perturbative and Non-Perturbative Physics With Power Accuracy in Heavy-Quark Effective Theory
Xiangdong Ji
I discuss a scheme to match perturbative and non-perturbative physics with power accuracy in the heavy-quark effective theory. I elaborate on two important aspects of the scheme: 1…
Locality of the Strange Sea in the Nucleon
Xiangdong Ji, Jian Tang
We introduce the concept of ``locality" for the strange sea in the nucleon, which measures proximity of the strange and anti-strange quarks in the momentum and coordinate spaces. T…
Exact Matching Condition for Matrix Elements in Lattice and Schemes
Xiangdong Ji
The exact matching condition is given for hadron matrix elements calculated in any two different schemes, in particular, in the lattice and dimensional regularization, (modified) m…